<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<h1>一个子页面</h1>
		<a href="https://so.com">so，本页面跳转</a>
		<br>
		<a href="https://so.com" target="_parent">so，父页面跳转</a>
		<br>
		<iframe src="sub-sub-page.html" width="" height=""></iframe>
	</body>
</html>
